Lesjaskog village in Lesja municipality in Oppland, Norway lies on lake Lesjaskogsvatnet.
Lake Lesjaskogsvatnet has outlets at both ends. A dam that was constructed by the Lesja Iron Works at Lesjaverk village in the 1660s to improve transportation caused the water which normally drained only to the Rauma river to also flow eastward into the Gudbrandsdalslågen river at Lesjaskog.
During the Second World War during the Namsos Campaign the British No. 263 Squadron RAF operated with 18 Gloster Gladiator biplane fighters from the frozen surface of Lake Lesjaskogsvatnet at Lesjaskog.